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YC Winter 2011 (W11)

45 companies Y Combinator lists for Winter 2011, with what each one builds. 2.6% of the tagged companies are AI, down from 6.5% in S10.

Companies
45
AI share
2.6%
Top sector
Productivity
5 companies
Second
Retail
5 companies

What’s in Winter 2011

Winter 2011 lists 45 companies so far (S10 had 36). The biggest themes by YC's tags are Marketplace (8), E-Commerce (4), API (3), Messaging (3) and Payments (3). The largest sectors are Productivity, Retail, Home and Personal and Engineering, Product and Design. 4.7% are based outside the US.

  • Marketplace · 8
  • E-Commerce · 4
  • API · 3
  • Messaging · 3
  • Payments · 3

See what YC asked founders to build · Breakout themes across batches

All Winter 2011 companies

45 companies

  • DrChrono

    The essential platform for modern medical practices and patients.

    Healthcare IT150San Francisco, CA, USAAcquired
  • Fivestars

    Customer loyalty and payments platform for small businesses.

    Retail201San Francisco, CA, USAAcquired
  • GOAT Group

    Platform for the greatest products from the past, present and future.

    Apparel and Cosmetics1600Los Angeles, CA, USA
  • HelloSign

    eSignature software for small and mid-market businesses.

    Productivity100San Francisco, CA, USAAcquired
  • ProductivitySan Francisco, CA, USA
  • AppHarbor

    .NET Cloud Platform as a Service

    Infrastructure1San Francisco, CA, USAInactive
  • Apportable

    iOS porting

    Infrastructure51San Francisco, CA, USAAcquired
  • Assembled

    Pivoted to TenXList, a professional network of top college engineers.

    Social2San Francisco, CA, USAInactive
  • Balanced

    Payments for Marketplaces

    Consumer Finance11San Francisco, CA, USAInactive
  • Beetailer

    Facebook stores.

    Retail2San Francisco, CA, USAInactive
  • Close

    CRM and sales automation suite

    Sales130Remote
  • Comprehend

    SaaS to increase speed and quality of clinical trials.

    Healthcare IT51San Francisco, CA, USAAcquired
  • Convore

    Hosted IRC and so much more.

    Social2San Francisco, CA, USAInactive
  • Custora

    Custora is a predictive analytics platform for e-commerce marketing…

    Analytics11New York City, NY, USAAcquired
  • Earbits

    Google AdWords for music. Allowing bands and labels to bid for…

    Marketing15Los Angeles, CA, USAAcquired
  • FitFu

    New projects

    Home and Personal2Ringwood, NJ, USAInactive
  • Flotype

    Third generation of web apps.

    Retail2San Francisco, CA, USAInactive
  • Hotspots

    Real-time analytics (acq by TWTR, 2012)

    Marketing2San Francisco, CA, USAAcquired
  • Humble Bundle

    Pay what you want for awesome games and other content while giving to…

    Gaming100San Francisco, CA, USAAcquired
  • Hyperink

    Ebook publisher.

    Content11San Francisco, CA, USAInactive
  • Inporia

    Fashion shopping email list.

    Apparel and Cosmetics11San Francisco, CA, USAInactive
  • Insight Data Science

    Turning PhDs & engineers into data scientists & data engineers

    Education11San Francisco, CA, USAInactive
  • Instapainting

    Custom-made artwork from artists e-commerce marketplace.

    Home and Personal2Tokyo, Tokyo, Japan
  • Lanyrd

    IMDB of conferences.

    Job and Career Services2San Francisco, CA, USAAcquired

Source: Y Combinator’s public company directory. Each company links to its YC profile. See how we count and what YC asked founders to build.

Frequently asked questions

How many companies are in YC Winter 2011?

Y Combinator's public directory lists 45 companies for Winter 2011 (W11), compared with 36 in Summer 2010. YC adds companies as they launch, so a recent batch can still grow.

What kind of startups are in YC Winter 2011?

The most common themes by YC's own tags are Marketplace (8), E-Commerce (4), API (3), Messaging (3) and Payments (3). The largest sectors are Productivity, Retail, Home and Personal and Engineering, Product and Design. 2.6% of the companies YC has tagged are AI.

Where are YC Winter 2011 companies based?

4.7% of Winter 2011 companies with a listed location are based outside the US.